Wikimedia Commons is a database of freely usable media files to which anyone can contribute. Each image has extensive details that include the Creative Commons licensing arrangement information.
Morgue File provides free photos with license to remix. The Morgue File photo collection contains thousands of images that anyone can use for free in academic or commercial presentations. The image collection can be searched by subject category, image size, color, or rating.
The World Images Kiosk hosted by San Jose State University offers more than 75,000 images that teachers and students can use in their academic projects. All of the images can be used under a Creative Commons license that requires you to give proper attribution when necessary. You can find images by using the search box or you can browse through more than 800 portfolios and groups organized by subject.
ImageBase is a personal project of professional photographer David Niblack. ImageBase contains more than one hundred pages of images that Mr. Niblack has released for free reuse and redistribution.
OpenPhoto is a photo sharing platform that offers images for free under Creative Commons licences.
Library of Congress Prints and Photographs contains digital images of photographs, fine and popular prints and drawings, posters, and architectural and engineering drawings held by the Library of Congress.
Image Editing
iPiccy: http://ipiccy.com/Big Huge Labs: http://bighugelabs.com
Clipping Magic: http://clippingmagic.com/
Images
Advanced Searching
Flickr: http://www.flickr.com/search/advanced/?Google: http://www.google.com/advanced_image_search?hl=en
Creative Commons Search: http://search.creativecommons.org/
Image Libraries
Stock Video Footage:
Music
Discovery Education Streaming: http://discoveryeducation.com - over 3,000 sound effects (requires school account)Free Play Music - http://freeplaymusic.com - music licensed for free student educational use. Can search by feel or mood.
Incompetech - http://incompetech.com/music/royalty-free/ - Creative Commons licenced music available by genre or feel.
Dan-O Songs - http://danosongs.com/ - original music available as MP3 downloads under an attribution Creative Commons license.
Josh Woodard - http://www.joshwoodward.com/music - original music available to freely download, share and use.
Musopen: http://www.musopen.com/ - Free classical music, searchable by composer, genre, form, instrument, performer, and period
Jamendo: http://www.jamendo.com/en/